Reflection tests

h2/src/test/org/h2/test/unit/TestUtils.java

+/*
+ * Copyright 2004-2010 H2 Group. Multiple-Licensed under the H2 License,
+ * Version 1.0, and under the Eclipse Public License, Version 1.0
+ * (http://h2database.com/html/license.html).
+ * Initial Developer: H2 Group
+ */
+package org.h2.test.unit;
+
+import java.io.File;
+import org.h2.test.TestBase;
+import org.h2.util.Utils;
+
+/**
+ * Tests reflection utils.
+ */
+public class TestUtils extends TestBase {
+
+    /**
+     * Dummy field
+     */
+    public final String testField = "abc";
+
+    /**
+     * Run just this test.
+     *
+     * @param a ignored
+     */
+    public static void main(String... a) throws Exception {
+        TestBase.createCaller().init().test();
+    }
+
+    public void test() throws Exception {
+        // Static method call
+        long currentTimeMillis1 = System.currentTimeMillis();
+        long currentTimeMillis2 = (Long) Utils.callStaticMethod("java.lang.System.currentTimeMillis");
+        assertTrue(currentTimeMillis1 <= currentTimeMillis2);
+        // New Instance with Integer parameter (Autoboxing)
+        StringBuilder instance = (StringBuilder) Utils.newInstance("java.lang.StringBuilder", new Integer(10));
+        // New Instance with int parameter
+        instance = (StringBuilder) Utils.newInstance("java.lang.StringBuilder", 10);
+        // Instance methods
+        Utils.callMethod("append", instance, "abc");
+        int length = (Integer) Utils.callMethod("length", instance);
+        assertEquals(3, length);
+        // Static fields
+        String pathSeparator = (String) Utils.getStaticField("java.io.File.pathSeparator");
+        assertEquals(File.pathSeparator, pathSeparator);
+        // Instance fields
+        String testField = (String) Utils.getField(this, "testField");
+        assertEquals(this.testField, testField);
+        // Class present?
+        assertFalse(Utils.isClassPresent("abc"));
+        assertTrue(Utils.isClassPresent(getClass().getName()));
+
+    }
+
+}